Re: The joy of FORTRAN

On Mon, 10 Mar 2025 15:37:29 +0000, Sn!pe wrote:

rbowman <bowman@montana.com> wrote:
 

   Looking at building a small FM transmitter wired to my mail-box.
   Being right at the road, and a bit away, it's useless trying to do
   image-ID and there is no hope of getting power out there.
>
>

Just for an alert? How far? I'd probably use a couple of Picos or even
Arduinos with nrf@$L01 modules.
 
https://howtomechatronics.com/tutorials/arduino/arduino-wireless-
communication-nrf24l01-tutorial/
 
and a PIR to detect when the box was opened.
>
>

PMFJI.

That was a new one on me... I had to consult wtf.

$ wtf PMFJI
PMFJI: pardon me for jumping in

A reed switch with a small permanent magnet attached to the door to
actuate it can do the detection very simply, cheaply and unobtrusively.
 
<https://en.wikipedia.org/wiki/Reed_switch>
 
In this instance, old tech can be best.

True. I think I've got a reed switch around someplace. However. for $9 I
got 5 HC-SR501 PIR modules, 2 mounting brackets with screws, a small
screwdriver, and some Dupont wires. You use what you has :)

True, I could get 20 glass reed switches for that, but then I'd have to
figure out a mount. The sets that are designed for doors and windows are
more expensive.